Oil-pump.



Patented Sept. 12-1899.

LE GRAND SKINNER.

OIL PUMP (Application filed Dec. 13, 1897.)

2 Sheets-Sheet I (No Model.)

INVENTOR 596M713 5k zwner WITNESSES:

gal-Ema ATTORNEY No. 632,949. Patehted Sept. 12, I899.

LE GRAND SKINNER.

OIL PUMP.

(Application filed Dec. 13, 1897.) (No Model.) 2 Sheets-Sheet 2 WITNESSES: INVENTOR ATTORNEY UNTTED STATES PATENT EETCE.

IIE GRAND SKINNER, OF ERIE, PENNSYLVANIA.

OIL-PUMP.

SPECIFICATION formingpart Of Letters Patent NO. 632,949, dated September 12, 1899.

Application filed December 13, 1897. Serial No. 661,672. (No model.)

To aZZ whom it may concern.-

Be it known that 1, LE GRAND SKINNER, a citizen of the United States, residing at the city of Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Oil-Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to improvements in oil-pumps of the class ordinarily used in mechanism for automatically lubricating engines and other machinery, hereinafter set forth and explained, and illustratedin the accompanying drawings, in which Figure 1 is a view of the same partially in side elevation and partially in section. Fig. 2 is a transverse section of the same on the line at a: in Fig. 1. Fig. 3 is a longitudinal section of a modified construction of the same.

In the drawings, A is the body of the pump, and B the plunger, provided with a stuffingbox 0 of the usual construction. In the rear end of the body A there is a chamber D, provided with an annular port cl, cut into the inside wall thereof and communicating with a suction-inlet-E, from which a pipe E, which is provided with a foot-valve e, extends to the oil-supply tank. (Not shown.) The chamber D is also provided with a second annular port d, which communicates with a dischargeopening F. In this opening there is a checkvalve G, which operates as and for the purpose hereinafter described.

In the chamber D there is fitted a sleeve H, which extends the entire length of said chamher, the portion H thereof forming the chamber fora cylindrical valve I, and the portion H thereof forming a pocket for the valvespring J, operating on the rear of the valve I. Through the portion II of the sleeve H radial openings h and h are cut, which coincide with the annular ports (I and d in the pumpbody A. Within the portion H of the sleeve H the cylindrical valve I is provided with an annular row of radial portsI, which as the valve moves forward and back in the sleeve I-I coincide alternately with the suction-ports h and the discharge-ports h in the sleeve II. From the discharge-opening F there is a small passage f, which leads'into the spring-chamber H and operates to relieve the pressure of any accumulation of oil therein upon the rear of the valve I.

It will be observed that the sleeve H, to gether with the valveI therein, can be readily removed from the pump-body A. When this is done, the check-valve G,Which is normally held up olf of its seat by the contact of the lower portion thereof with the sleeve H, immediately closes upon its seat and prevents any backward flow of oil from the pipe F, connected with the discharge-opening F of the pump.

In Fig. 3 I show a modified construction of my invention. In this figure the positions of the inlet-port d and the discharge-port d are reversed from the positions of the ports in Figs. 1 and 2, and when the plunger 13 moves back it moves the valve I with it until the end of the valve uncovers the dischargeport 01 In all other respects the construction and operation shown in Fig. 3 are the same as. that in Figs. 1 and 2 hereinbefore described.

In operation as the plunger B is drawn back the valve I is moved forward by the action of the spring J until the ports I therein coincide with the ports h in the sleeve H, and as the plunger moves on backward the body of the pump is sucked full of oil; but when the movement of the plunger B is reversed the pressure moves the valve I baclgcompressing the spring J until the ports I therein coincide with the discharge-ports h in the sleeve H, when the oil in the pump-bodyAis forced up and out of the discharge-opening F.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent of the United States, is

l. The combination in an oil pump, of a pump-body having a suction-port and a discharge-port, a removable internal sleeve or pump-barrel telescopinginto said pump-body and having ports therein adapted to register with the ports in the pump-body, a head forming the rear end of said sleeve or pump-barrel and adapted to screw into the rear end of the pump-body, an annular sleeve-valve adapted to reciprocate in said sleeve or pump-barrel having the rear thereof closed, and having radial ports therein adapted to coincide with the ports in the sleeve orpump-barrel, a plunger adapted to enter the open end of said valve, and a spring behind the rear end of said valve, substantially as and for the purpose set forth.

2. The combination in an oil-pump, of a pump-body A having a cylindrical pumpchamber with radial suction and discharge ports therein, a removable cylindrical sleeve or pump-barrel H having radial ports therein and a head closing the rear thereof, adapted to be secured into the rear end of the pumpchamber, a sleeve-valve I having radial ports therein and closed at its rear end, adapted to reciprocate in said sleeve or pump-barrel, a spiral spring J in a recess H in the head of the sleeve or pump-barrel H adapted to operate against the closed end of the valve I, and aplunger B adapted to enter the open end of said valve, substantially as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

LE GRAND SKINNER. Witnesses:

FRED EINFELDT, HENRY A. CLARK; 

